A kind of concrete prefabricated heavy stone of Navigation Mark
Technical field
It the utility model is related to a kind of cement prefabricated component, and in particular to a kind of concrete prefabricated heavy stone of Navigation Mark.
Background technology
Navigation mark is the abbreviation of aids to navigation, and index shows the mark of direction along ng a path, boundary and obstruction, including crossing mark, edge
Shore beacon, beacon, transit leading mark, head and stern leading marks, lateral marks, separate channel mark, position indicating mark, flood mark and bridge mark etc..It is to aid in
Guide the artificial target of ship's navigation, positioning and sign obstruction with representing warning.
Navigation mark is made up of heavy stone, anchor chain, floating drum, lamp bracket, and cat face is connected to heavy stone and floating drum.Heavy stone uses prefabricated water mostly
Clod(Also there is cast iron casting), bottom indents, 3 ~ 12 tons are typically weighed about, is sunken in the mud in river course, so not easily shifted, it is ensured that on
The floating drum in face will not drift(Unless anchor chain is broken).
Existing heavy stone uses the pre-cast concrete block of some simple structures mostly, using process it occur frequently that navigation mark has upwards
The phenomenon of skew, because navigation mark position is offset, it can become twisted often over a period of time later original straight navigation mark line
Turn round.
The reason for these navigation marks are offset is that this skew has a spy because heavy stone shifts in the presence of current
Point, exactly heavy stone can sail against the current.This right two parts reason of phenomenon causes:
(1)Referring to accompanying drawing 1, according to bernoulli principle, i.e.,:Kinetic energy+gravitional force+pressure potential=constant.It is the most famous
Inference be:During contour flowing, flow velocity is big, and pressure is with regard to small.Current pass through stone 10 at a high speed in the front upper place of stone 10 in accompanying drawing 1
The flow velocity of current at anterior position 7 is much higher than the water velocity at the rear position 8 of stone 10, therefore at anterior position 7
Pressure is less than the pressure at rear position 8, and pressure differential causes stone 10 to be sailed against the current;
(2)Referring to accompanying drawing 1, stone 10 is pressed on the sediment deposit 9 in riverbed, and the silt in the front of stone 10 can be by the water of high speed
Stream is taken away, and the pit of a crescent, effect of the stone 10 in gravity and above-mentioned difference force can be formed in the front of stone 10
Under can turn forward, displacement forward occurs.
In the prior art in order to avoid heavy stone drift is moved, using the method for big weight stone, the big current difference of stone weight is led
The transportation of the pressure difference of cause is limited.
Utility model content
The purpose of this utility model is to provide a kind of Navigation Mark concrete prefabricated heavy stone, to solve above-mentioned background technology
In the problem of mentioning.
To achieve the above object, the utility model provides following technical scheme:A kind of concrete prefabricated heavy stone of Navigation Mark,
Including heavy stone body and conical points foot, anchor chain retainer ring, described anchor chain retainer ring is arranged on the top of heavy stone body, institute
The conical points stated are evenly distributed on heavy stone body bottom portion and the edge of bottom enough;Described heavy stone body and conical points foot
The overall structure being formed in one.
Behind the utility model input river course, its conical points can penetrate the silt layer in riverbed enough, the cone in insertion riverbed depths
Under the obstruction of shape point foot, pressure difference will not cause the utility model displacement caused by the current difference before and after the utility model.
Preferably, 25 °~45 ° are skimmed outside the setting angle of the conical points foot on bottom margin position.Therefore flowing water is in this reality
The position of the zap pit formed with new front will not it is cross-domain before the conical points skimmed press close to heavy stone body enough and cause gravity unbalance
Youngster tilts;Other fulcrum force of the present utility model is on conical points foot, even if heavy stone body nearby has the phenomenon of silt underwashing
Also its stress balance will not be destroyed;Moreover, heavy stone body nearby have silt underwashing fall after conical points can be pressurized enough sinking, more
Will not occurred level to displacement.
Preferably, the stone body upper surface that sinks also is provided with twice fluid ditch.Front and rear pressure difference of the prior art is because flow velocity
Difference causes, and because heavy stone body front end faces flowing water directly, flowing water is high in the flow velocity of front-end surface, because the stop of heavy stone body is made
With one side that heavy stone body facing away from flowing water can form a fluid dead band, and the speed of current is very slow, therefore front and rear current difference
It is larger.When the utility model is put into river course, make the direction of fluid ditch along the direction of current.Heavy stone body can so be reduced
The scope in the dead band of rear end, the flow velocity of heavy stone body rear end current is improved, reduce the current difference before and after heavy stone body, and then reduce
Front and rear pressure difference.
The advantages of the utility model, is as follows:
(1)It will not be subjected to displacement in bottom of river channel;
(2)Prior art is in order to avoid being subjected to displacement, using big heavy stone, heavy stone weight that the utility model uses
It is small, transport and lay and be more convenient.
Brief description of the drawings
Fig. 1 is the schematic diagram that stone countercurrently moves in river course in the prior art;
Fig. 2 is the utility model structure diagram;
Fig. 3 is the diagrammatic cross-section that the utility model sinks to river bed.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
2 and accompanying drawing 3 referring to the drawings, a kind of concrete prefabricated heavy stone of Navigation Mark, including heavy stone body 1 and conical points
Foot 2, anchor chain retainer ring 4, described anchor chain retainer ring 4 are arranged on the top of heavy stone body 1, uniform point of described conical points foot 2
Cloth is on the edge of the heavy bottom of stone body 1 and bottom;Described heavy stone body 1 and conical points foot 2 is formed in one whole
Body structure.
Referring to the drawings 3, after the utility model puts into river course, its conical points foot 2 can penetrate the silt layer in riverbed 5, insert
Under the obstruction of the conical points foot 2 of the depths of riverbed 5, pressure difference caused by the current difference before and after the utility model will not cause this practicality new
Type displacement.
2 and accompanying drawing 3 referring to the drawings, it is preferred that the conical points on bottom margin position, skim outside 2 setting angle 25 °~
45°.Therefore the position of zap pit that flowing water is formed in front of the present utility model will not it is cross-domain before the conical points skimmed enough 2 press close to it is heavy
Stone body 1 causes the unbalance youngster of gravity to tilt;Other fulcrum force of the present utility model is on conical points foot 2, even if heavy stone body 1
The phenomenon for nearby having silt underwashing will not also destroy its stress balance;Moreover, heavy stone body 1 nearby has silt underwashing to be bored after falling
Shape point foot 2 can be pressurized sinking, more will not occurred level to displacement.
Front and rear pressure difference of the prior art is because current difference causes, and because the heavy front end of stone body 1 faces flowing water directly, flowing water exists
The flow velocity of front-end surface is high, and due to the barrier effect of heavy stone body 1, one side that heavy stone body 1 facing away from flowing water can form one
Fluid dead band, the speed of current is very slow, therefore front and rear current difference is larger.Preferably, the heavy upper surface of stone body 1 is also provided with twice
Fluid ditch 3;When the utility model is put into river course, make the direction of fluid ditch 3 along the direction of current.Heavy stone can so be reduced
The scope in the dead band of the rear end of body 1, the flow velocity of the heavy rear end current of stone body 1 is improved, reduces the current difference before and after heavy stone body 1,
And then pressure difference before and after reducing.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge
Make a variety of changes.It is it should be appreciated that all new in this practicality using other specific embodiments of New Scheme based on this
Within the protection domain of type.